Originally Posted By: sir1900
Not at a parts store, but at a dealership about 6 years ago:
You can switch from Quaker State to Pennzoil at anytime, but once you start using Pennzoil, you can't switch to any other brand after that.
That was the last time I had my vehicle serviced there.
That's like the common line that you can't go back to conventional after using synthetic because they don't mix.
But, they have synth blend oil on the shelf in plain view.
Not at a parts store, but at a dealership about 6 years ago:
You can switch from Quaker State to Pennzoil at anytime, but once you start using Pennzoil, you can't switch to any other brand after that.
That was the last time I had my vehicle serviced there.
That's like the common line that you can't go back to conventional after using synthetic because they don't mix.
But, they have synth blend oil on the shelf in plain view.